Menu

Navigation

More options

Style variation

Contact us

Special and General Relativity Forum

Join in expert discussion on special and general relativity discussion. Relativity is the dependence of various physical phenomena on relative motion of the observer and the observed objects.

Filters

Can a Photon Orbit a Black Hole?

Oct 31, 2006 · Replies 8 · Nov 19, 2006

Replies: 8

Views: 3K

Measurement of distances in the presence of a black hole

Nov 3, 2006 · Replies 14 · Nov 19, 2006

Replies: 14

Views: 3K

Finding the inertial frame in the two-body problem in GR

Nov 7, 2006 · Replies 2 · Nov 19, 2006

Replies: 2

Views: 3K

Defining GR with Poisson Bracket

Nov 11, 2006 · Replies 7 · Nov 19, 2006

Replies: 7

Views: 3K

Comparing Gravitational Accelerations: Newtonian vs. General Relativity

Nov 7, 2006 · Replies 6 · Nov 19, 2006

Replies: 6

Views: 4K

Perihelion drift in SR and in GR

Nov 13, 2006 · Replies 1 · Nov 19, 2006

Replies: 1

Views: 2K

Are horizons fingerprints of General Relativity ? and more questions

Nov 13, 2006 · Replies 5 · Nov 19, 2006

Replies: 5

Views: 3K

How Does the Minkowski Metric Relate to Tensors in General Relativity?

Nov 18, 2006 · Replies 18 · Nov 19, 2006

Replies: 18

Views: 10K

Why do light rays emitted at the event horizon stay there in a black hole?

Nov 14, 2006 · Replies 6 · Nov 19, 2006

Replies: 6

Views: 3K

Gravitational Waves & Unification: Einstein's Remark?

Nov 18, 2006 · Replies 12 · Nov 19, 2006

Replies: 12

Views: 3K

Gravitomagnetism: 17 Orders of Magnitude Beyond GR Prediction

Nov 16, 2006 · Replies 7 · Nov 19, 2006

Replies: 7

Views: 3K

Unraveling the Mystery of E=mc^2: The Surprising Truth About Light's Energy

Nov 19, 2006 · Replies 3 · Nov 19, 2006

Replies: 3

Views: 2K

Is E=mc^2 an Exact Equation or an Approximation?

Nov 14, 2006 · Replies 7 · Nov 19, 2006

Replies: 7

Views: 4K

Charge Invariance: Argument Explained

Nov 7, 2006 · Replies 12 · Nov 19, 2006

Replies: 12

Views: 5K

Mechanical experiments testing special relativity?

Nov 18, 2006 · Replies 4 · Nov 19, 2006

Replies: 4

Views: 3K

Is the relativity of simultaneity relative?

Nov 17, 2006 · Replies 7 · Nov 18, 2006

Replies: 7

Views: 4K

Is it possible to derive Lorentz-transforms through geometric methods?

Sep 13, 2005 · Replies 11 · Nov 17, 2006

Replies: 11

Views: 8K

Four-Vector Physics: Exploring Questions

Nov 17, 2006 · Replies 4 · Nov 17, 2006

Replies: 4

Views: 4K

Questions on Spacecraft, Light Mass, Relativity & Quantum Theory

Nov 16, 2006 · Replies 5 · Nov 17, 2006

Replies: 5

Views: 2K

Relativistic Action: Lorentz Transform to Get Action A

Nov 16, 2006 · Replies 6 · Nov 16, 2006

Replies: 6

Views: 4K

Does c-u mean that c composes with u?

Nov 13, 2006 · Replies 7 · Nov 15, 2006

Replies: 7

Views: 3K

Why should the covariant derivative of the metric tensor be 0 ?

Nov 15, 2006 · Replies 8 · Nov 15, 2006

Replies: 8

Views: 7K

How to use Einsteins Field Equations ?

Nov 10, 2006 · Replies 13 · Nov 14, 2006

Replies: 13

Views: 4K

Length Contraction: Row of Blocks & Rods

Nov 11, 2006 · Replies 6 · Nov 14, 2006

Replies: 6

Views: 3K

Understanding Tensors: A Beginner's Guide to Relativity | New Member Question

Nov 13, 2006 · Replies 9 · Nov 14, 2006

Replies: 9

Views: 3K

How can I show that G=8pT implies the equivalence principle ?

Nov 9, 2006 · Replies 18 · Nov 14, 2006

Replies: 18

Views: 4K

Simultaneity in Special Relativity and lorentz transformation

Nov 13, 2006 · Replies 3 · Nov 14, 2006

Replies: 3

Views: 7K

Isolated Horizons: Definition & Use

Oct 16, 2006 · Replies 5 · Nov 13, 2006

Replies: 5

Views: 4K

Temporal distortion along train DURING Acceleration

Nov 6, 2006 · Replies 6 · Nov 13, 2006

Replies: 6

Views: 3K

Understanding Pointlike & Local Energy Density

Nov 12, 2006 · Replies 5 · Nov 12, 2006

Replies: 5

Views: 2K

Relativity and Faster than the speed of light.

Nov 6, 2006 · Replies 8 · Nov 12, 2006

Replies: 8

Views: 3K

Reverse time dilation possible?

Nov 10, 2006 · Replies 5 · Nov 12, 2006

Replies: 5

Views: 12K

How does relativity show that energy is proportional to frequency?

Oct 20, 2006 · Replies 20 · Nov 11, 2006

Replies: 20

Views: 5K

E = mc2 is not really true in all cases?

Oct 26, 2006 · Replies 9 · Nov 10, 2006

Replies: 9

Views: 10K

A black hole thought experiment

Nov 7, 2006 · Replies 10 · Nov 9, 2006

Replies: 10

Views: 3K

Light Speed Separation: How Long?

Nov 9, 2006 · Replies 1 · Nov 9, 2006

Replies: 1

Views: 2K

Is E = mc^2 the only formula for total energy?

Nov 7, 2006 · Replies 11 · Nov 9, 2006

Replies: 11

Views: 3K

Gamma Explained: Reasons for Lorentz Transformation

Nov 9, 2006 · Replies 13 · Nov 9, 2006

Replies: 13

Views: 3K

Newton's Gravity corrected and Pioneer 10 anomaly

Nov 4, 2006 · Replies 5 · Nov 8, 2006

Replies: 5

Views: 3K

The Mystery of Photon Motion: How Do Photons Perceive One Another?

Nov 1, 2006 · Replies 15 · Nov 8, 2006

Replies: 15

Views: 3K

Black Hole Questions: Mass Increase & Formation

Oct 31, 2006 · Replies 23 · Nov 7, 2006

Replies: 23

Views: 5K

Heated discussion about a flaw

Oct 15, 2006 · Replies 11 · Nov 7, 2006

Replies: 11

Views: 3K

Temporal distortion of a moving train

Nov 5, 2006 · Replies 27 · Nov 7, 2006

Replies: 27

Views: 4K

Why was Lorentz transformation known before Einstein explained clock synchronisation

Nov 5, 2006 · Replies 10 · Nov 7, 2006

Replies: 10

Views: 4K

Topology of Spacetime: Non-Compactness Not Required?

Nov 6, 2006 · Replies 2 · Nov 6, 2006

Replies: 2

Views: 4K

Solving the Submarine Problem: Will it Rise or Sink?

Nov 5, 2006 · Replies 2 · Nov 6, 2006

Replies: 2

Views: 4K

Precession of the perihelion - Schwarzschild metric

Nov 4, 2006 · Replies 3 · Nov 5, 2006

Replies: 3

Views: 5K

Are there other phenomena (besides light) whose speed is invariant?

Nov 4, 2006 · Replies 1 · Nov 4, 2006

Replies: 1

Views: 2K

Einstein's Special Theory of Relativity: Beam Angle

Nov 2, 2006 · Replies 21 · Nov 4, 2006

Replies: 21

Views: 8K

Why did Einstein use light to define simultaneity?

Nov 3, 2006 · Replies 5 · Nov 4, 2006

Replies: 5

Views: 4K

Does Gravity Affect the Local Speed of Light in Accelerated Frames?

Nov 3, 2006 · Replies 4 · Nov 4, 2006

Replies: 4

Views: 3K

Lightbulb Paradox: Solving John Wheeler's Problem in SpaceTime Physics

Nov 2, 2006 · Replies 2 · Nov 3, 2006

Replies: 2

Views: 5K

Pair production and another body?

Oct 30, 2006 · Replies 12 · Nov 2, 2006

Replies: 12

Views: 4K

How Can Successive Boosts Illuminate the Lorentz Transformation?

Nov 2, 2006 · Replies 5 · Nov 2, 2006

Replies: 5

Views: 2K

Is Conservation of Scalar Quantities Possible in General Relativity?

Oct 31, 2006 · Replies 14 · Nov 2, 2006

Replies: 14

Views: 3K

Is Time Merely a Consequence of Space and Speed Limit c?

Nov 1, 2006 · Replies 9 · Nov 2, 2006

Replies: 9

Views: 3K

Trying to understand relativity of lengths and times

Oct 30, 2006 · Replies 31 · Nov 1, 2006

2

Replies: 31

Views: 4K

Figuring out the units for the cosmological constant

Oct 27, 2006 · Replies 7 · Nov 1, 2006

Replies: 7

Views: 7K

Why Do Space-Time Diagrams Reverse Axes in Special Relativity?

Oct 31, 2006 · Replies 3 · Oct 31, 2006

Replies: 3

Views: 4K

Understanding Spacetime Geometry: Timelike and Spacelike Vectors Explained

Oct 29, 2006 · Replies 6 · Oct 31, 2006

Replies: 6

Views: 3K

Does Mass Really Increase Infinitely as Objects Approach the Speed of Light?

Oct 26, 2006 · Replies 19 · Oct 31, 2006

Replies: 19

Views: 3K

Is e=mck Compatible with Einstein's Theory of Relativity?

Oct 31, 2006 · Replies 1 · Oct 31, 2006

Replies: 1

Views: 3K

How Speed of Light Is the Same Speed in All Frames

Oct 29, 2006 · Replies 12 · Oct 31, 2006

Replies: 12

Views: 2K

Was the Schwarzschild geometry acceptable

Oct 29, 2006 · Replies 6 · Oct 30, 2006

Replies: 6

Views: 3K

Question on Einstein's Equation

Oct 30, 2006 · Replies 1 · Oct 30, 2006

Replies: 1

Views: 2K

Speed of Moving Object: Exploring Length Contraction & Time Dilation

Oct 28, 2006 · Replies 4 · Oct 30, 2006

Replies: 4

Views: 3K

Resolving the Incompatibility of Special Relativity and Quantum Mechanics

Oct 29, 2006 · Replies 2 · Oct 29, 2006

Replies: 2

Views: 2K

Proper time for an object falling into a black hole

Oct 28, 2006 · Replies 5 · Oct 29, 2006

Replies: 5

Views: 9K

Relativity and Lorentz Symmetry: What is the Relationship to Reality?

Oct 19, 2006 · Replies 55 · Oct 29, 2006

2

Replies: 55

Views: 6K

Negative Mass and its Implications

Oct 29, 2006 · Replies 3 · Oct 29, 2006

Replies: 3

Views: 3K

The speed of light in a vacuum?

Sep 18, 2006 · Replies 19 · Oct 27, 2006

Replies: 19

Views: 5K

How Do Time Sources and Space Sinks Relate to General Relativity?

Oct 26, 2006 · Replies 4 · Oct 27, 2006

Replies: 4

Views: 2K

Important note concerning relativity of time

Oct 22, 2006 · Replies 4 · Oct 27, 2006

Replies: 4

Views: 2K

Is Spacetime Shaped Like the Sea?

Oct 25, 2006 · Replies 7 · Oct 27, 2006

Replies: 7

Views: 2K

What Is the Relationship Between Photon Mass and Frequency?

Oct 23, 2006 · Replies 2 · Oct 27, 2006

Replies: 2

Views: 3K

What is time dilation and how does it relate to Einstein's theory?

Oct 9, 2006 · Replies 108 · Oct 26, 2006

4

Replies: 108

Views: 16K

How Does Relativity Affect Movement on a Ship Near Light Speed?

Oct 24, 2006 · Replies 12 · Oct 26, 2006

Replies: 12

Views: 3K

Does Newtonian gravity bend light?

Jul 10, 2006 · Replies 31 · Oct 26, 2006

2

Replies: 31

Views: 24K

Inertial Reference Frames- circular?

Oct 23, 2006 · Replies 34 · Oct 25, 2006

2

Replies: 34

Views: 5K

Freezing light contradicts Einstein?

Oct 23, 2006 · Replies 10 · Oct 24, 2006

Replies: 10

Views: 3K

Could You Pick Up an Airplane in Frozen Time?

Oct 22, 2006 · Replies 22 · Oct 24, 2006

Replies: 22

Views: 4K

ICAL SCIENCE: Unraveling Hawking's Paradox and Controversial Theories

Oct 23, 2006 · Replies 4 · Oct 23, 2006

Replies: 4

Views: 5K

Is General Relativity Actually an Aether Theory?

Nov 16, 2005 · Replies 11 · Oct 23, 2006

Replies: 11

Views: 3K

SR transforms of matter/light interactions

Oct 16, 2006 · Replies 10 · Oct 23, 2006

Replies: 10

Views: 4K

A moving clock lags behind a stationary clock

Oct 22, 2006 · Replies 2 · Oct 23, 2006

Replies: 2

Views: 6K

Why Mass Doesn't Always Add When Two Systems Combine

Oct 20, 2006 · Replies 20 · Oct 23, 2006

Replies: 20

Views: 4K

Twins Paradox: Does Twin A Die?

Oct 22, 2006 · Replies 9 · Oct 22, 2006

Replies: 9

Views: 2K

Relativity and Absolute Space: A Reconciliation?

Oct 10, 2006 · Replies 61 · Oct 22, 2006

3

Replies: 61

Views: 8K

Inertial mass, invariant mass and the photon?

Oct 16, 2006 · Replies 12 · Oct 22, 2006

Replies: 12

Views: 10K

Black Holes and the Event Horizon?

Oct 19, 2006 · Replies 16 · Oct 22, 2006

Replies: 16

Views: 4K

How Fundamental Is General Relativity in Understanding Black Holes?

Oct 22, 2006 · Replies 1 · Oct 22, 2006

Replies: 1

Views: 2K

What is the Meaning of Action? Investigating the Connection between GR & QM

Oct 11, 2006 · Replies 6 · Oct 22, 2006

Replies: 6

Views: 3K

Einstein's original paper question

Oct 20, 2006 · Replies 1 · Oct 20, 2006

Replies: 1

Views: 6K

Evidence for length contraction

Oct 7, 2003 · Replies 14 · Oct 20, 2006

Replies: 14

Views: 10K

Is Light-Like an Appropriate Term in Minkowski Space Terminology?

Oct 19, 2006 · Replies 7 · Oct 20, 2006

Replies: 7

Views: 2K

Correct derivation of magnetism from SR

Sep 25, 2006 · Replies 6 · Oct 18, 2006

Replies: 6

Views: 4K

Photons Perceive Universe as 2D: A Curious State?

Oct 18, 2006 · Replies 2 · Oct 18, 2006

Replies: 2

Views: 5K

Gyroscopic action on earth surface

Oct 16, 2006 · Replies 6 · Oct 17, 2006

Replies: 6

Views: 4K

Why Doesn't Relativity Apply to Light?

Sep 28, 2006 · Replies 68 · Oct 17, 2006

3

Replies: 68

Views: 9K

Einstein's theory of relativity?

Oct 15, 2006 · Replies 10 · Oct 16, 2006

Replies: 10

Views: 4K

Relativity

The theory of relativity, formulated by Albert Einstein, comprises two fundamental theories—special and general relativity. Special relativity, proposed in 1905, redefines our understanding of space and time by asserting the constancy of the speed of light for all observers and introducing concepts like time dilation and length contraction.

General relativity, presented in 1915, extends these principles to incorporate gravity. It describes gravity as the curvature of spacetime caused by massive objects, leading to phenomena like gravitational time dilation and the prediction of black holes. Einstein's equations have been consistently validated through experiments and observations, profoundly influencing our comprehension of the universe's fabric and dynamics.

Top